ABB ACS550-02 User Manual page 3

Safety
General
ACS550 in this manual refers, unless otherwise stated, to types ACS550-02 and
-U2.
Warning! The ACS550 adjustable speed AC drive should ONLY
be installed by a qualified electrician.
Warning! Even when the motor is stopped dangerous voltage is
present at the Power Circuit terminals U1, V1, W1 and U2, V2, W2
and U , U .
C+ C-
Warning! Even when power is removed from the input terminals of
the ACS550, there may be dangerous voltage (from external
sources) on the terminals of the relay outputs RO1 to RO3.
Warning! The ACS550-02/-U2 is a field repairable unit. In case of
service or repair of malfunctioning unit, contact your local
Authorized Service Centre for service.
Warning! The ACS550 will start up automatically after an input
voltage interruption if the external run command is on.
Warning! When the control terminals of two or more drive units are
connected in parallel, the auxiliary voltage for these control
connections must be taken from a single source which can either
be one of the units or an external supply.
Warning! The heat sink may reach a high temperature, see
Technical Data chapter.
1
Safety